Haven't found many authors here at T-Nation who are fans of AM/PM muscle group splits, but I've been working out constantly for ~6 months now (just finished a modified Westside program), and am looking for something a little more intense.

Found some AM/PM splits in Waterbury's HFS, but that's not my kinda scene.

With AM/PM splits you have to figure out what your goal is. Some people use AM/PM splits because they want to up volume. Some want to up frequency. Some people just like to get the extra metabolic rise.

I suggest you check out Chads article that tells you how to build your own high frequency system.

CT has many as of late. Check out his HSS-100. Also his article on Eastern Block Bodybuilding. Another gem from a few years ago is the Growth Surge Project, written for use with MAG-10 but IMO its doable with enough food and rest.

Just use the search function and those should be easy enough to find,Phill